Perhaps you should try some spelling variations:
coleccion practicas » coleccion practica, coleccion didactica, coleccion actas
la academico » lo academico, la academia, y academico
un academico » ano academico, lo academico, y academico
mexicana la » mexicana a, mexicano la, mexicana una
la cirugia » en cirugia, de cirugia

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: coleccion practicas de ((la academico) OR (un academico)) mexicana la cirugia.~.
• Adding a wildcard symbol may retrieve word variants: coleccion practicas de ((la academico) or (un academico)) mexicana la cirugia.*.